Keepa is a free Amazon price-tracking tool best known for its browser extension, which overlays historical price and sales-rank charts directly on Amazon product pages. It stands out for being genuinely free to use, with no paid tier required for its core price-history and deal-hunting features. Widely used by both everyday shoppers checking if a deal is real and by resellers gauging a product's sales history.

Keepa's Core Features

• Historical price and sales rank charts on Amazon product pages
• Price drop and price-target alerts
• Deal and discount tracking across Amazon categories
• Chrome, Firefox, and Edge browser extension
• Product tracking lists and CSV export
• Optional Keepa API for developers

Keepa's Use Cases

1. Shoppers can use price history charts to see if a listed 'deal' is actually a genuine discount.
2. Resellers can use rank tracking to gauge how well a product typically sells over time.
3. Deal hunters can use Keepa's deal feed to find current price drops across categories.
4. Sellers can use price-target alerts to know when a competitor drops below a threshold.
5. Developers can use the Keepa API to pull historical pricing data into their own tools.